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Depends. A cubic meter of WHAT? If it's a cubic meter of lead, it would weigh quite a bit. A cubic meter of air, not so much. The standard substance that is used to relate metric measurements to each other is water. The "gram" was defined as the mass (not weight, but similar) of one cubic centimeter of water at normal temperature. There are 1 million cubic centimeters in a cubic meter, so a cubic meter of water would have a mass of 1 million grams, or 1,000 kilograms, or 1 metric ton. To obtain the mass of 1 cubic meter of some other substances, simply multiply the specific gravity of the substance by the mass of a cubic meter of water.
One tonn
At room temperature and 1 atmosphere, the mass of one cubic metre of water is 0.998 207 1 tons.
I don't know what your units are, so let me assume they are m (meters) 2m x 8m x 10m = 160 cubic meters of material can fit into that cube. The standard substance that is used to relate metric measurements to each other is water. The "gram" was defined as the mass (not weight, but similar) of one cubic centimeter of water at normal temperature. There are 1 million cubic centimeters in a cubic meter, so a cubic meter of water would have a mass of 1 million grams, or 1,000 kilograms, or 1 metric ton. To obtain the mass of 1 cubic meter of some other substances, simply multiply the specific gravity of the substance by the mass of a cubic meter of water
"The density is 3,000 kg per cubic meter." That tells you that every cubic meter of it has 3,000 kg of mass.There are 6 cubic meters in 6 cubic meters.Each cubic meter has 3,000 kg of mass.So in 6 cubic meters, there are (6 x 3,000) = 18,000 kgof mass